Willis ISD delayed classes at all of the district’s secondary schools following a bomb threat at a nearby business.

Class begins at 10 a.m. Monday for students at Willis High School, Brabham Middle School and Lucas Middle School. According to the district’s website, officials made the decision to delay class after a bomb threat at National Oil Well on Highway 75 at Meador.

According to the Montgomery County Police Reporter, authorities evacuated National Oil Well and moved all the employees to the Willis High School campus. Conroe police are investigating the threat.

Highway 75 has re-opened.